Bolt and nut.



A. GOLDSMAN.

BOLT ANU NUT.

APPLMIA'LION FILED SEPT; 1f, 1011.

1,035,1 18.` atauted Aug. 6, 1912.

UNirED STATES, PATENT OFFICE.

.AIN XANJDERGOLDSMAN, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TOAUGUSTA MATZNER, OF NEW YORK, Y.

BOLT AND NUT.

lSpecification of Letters Patent.

i Patented Aug.e,1912.

Application led September 15, 1911. Serial No. 649,571.

To all whom 'it may concern.-

Be it known4 that I, ALEXANDER GOLDS- MAN, of the city, county, andState of\ New York, have invented a new and useful Im provement in Boltsand Nuts,`of which the l following is a specification.

directions is permitted. In the construction .illustrated the nut13a^which may be the .right-hand threaded nut, is formed of two Thisinvention relates to bolts and nuts, the object being .to prevent thenut orthe bolt from loosening. To accomplish this I l nuts are coupledtogether in such. manner Jthat separation thereof is prevented whilesimultaneous. rotation thereof 'in opposite spaced sections joined by abridge-piece 20,

'.'which'may or may not/be lintegral with the sections.: Thef' nut '14which may be the left-hand lthrea/ded nut is formed so as to fit in'tothe. ,space between the sections of the nut 13a. The formation ofthevtwo nuts is 'such that they may be simultaneously rotated inopposite directions, thus enabling them to be screwed onto or 0E fromthe bolt.

Itis obvious that the nut 13a may be two separate. nuts, having threadsof the same character and connected together by suitable means. In4other words, this may be regarded'as a two-nut structure, or as athreenut structure.

For the purposes of my invention, it is not necessary to have 'a rightand leithand thread, for two vright or two left-hand threads on thelsame bolt will accomplish the same work. If there are two threadshaving the same direction they must be ofa different pitch. Forinstance, if one thread makes two revolutions per inch, the secondthread must make four revolutions per inch.

Having thus described my invention, what I claim as new is:

1. The combination of a bolt having both rightand left-hand threadsoccupying the same regiontwo nuts having threads of the same character,with means coupling them together in spaced relation, and a nut oppo.

sitely-threaded fitting into the space between i the aforesaid nuts.

2. The combination of a bolt havingboth rightand left-hand threadsoccupying the same region, a nut comprising two spaced sections and abridge-piece connecting them together, andan oppositely-threaded nutre-l ceived between said sections.

In witness whereof, I have hereunto set my hand this 13th day ot'September, 1911.

ALEXANDER GOLDSMAN. y In the presence of-v A. MATZNER, CLARENCE G.GALsToN.

